Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
vat thanh » dat thanh, gat thanh, tat thanh
su triet » su viet, su tien, ve triet
nam thuc » nam thuoc, am thuc, nam thu
sach ky » sach y, sach ty, sach kem
hieu va » lieu va, hieu qua
nang xa » lang xa, nang ma, mang xa
va nam » van nam, ha nam, va nay
sac ky » cac ky, sai ky
vai su » va su, van su, lai su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (sac ky)) ((nang xa) OR (nang x)) hoi. hieu va nam thuc vat thanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) ((nang xa) OR (nang x)) hoi. hieu va nam thuc vat thanh vai su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sac ky)) ((nang xa) OR (nang x)) hoi. hieu va nam thuc vat thanh vai su triet*".